# 录制音频

Source: [https://docs.qualcomm.com/doc/80-70017-50SC/topic/gst-audio-encode-example-without-flac.html](https://docs.qualcomm.com/doc/80-70017-50SC/topic/gst-audio-encode-example-without-flac.html)

**gst-audio-encode-example** 应用程序以 FLAC 或 WAV 格式对音频进行编码。

此程序的常见用例是编码实时音频数据，以便进行流传输或存储。

该图显示了一个 pipeline，该 pipeline 采集音频，将流转换为 FLAC 或 WAV 格式，对流进行编码，并将其存储在文件中。有关 pipeline 中使用的插件的更多信息，请参阅 [Pipeline 流](https://docs.qualcomm.com/doc/80-70017-50SC/topic/gst-audio-encode-example-without-flac.html#gst-audio-encode-example-without-flac__section_uj5_4v5_4bc)。

Figure : gst-audio-encode-example pipeline
            
            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)

## 前提条件

- 要访问您的主机设备，请启用 SSH。相关说明，可参见[使用 SSH 登录](https://docs.qualcomm.com/bundle/publicresource/topics/80-70017-254/how_to.html#use-ssh)。
注释： 如果启用了 SSH，则可以跳过此先决条件。
- 进入 SSH shell 并运行用例：

        ssh root@<ip-addr of the target device>Copy to clipboard
- 启用显示屏：

        export XDG_RUNTIME_DIR=/dev/socket/weston && export WAYLAND_DISPLAY=wayland-1Copy to clipboard
- 从 Linux 主机推送文件：

        scp <filename> root@<IP address of target device>:/opt/Copy to clipboard

## 运行应用程序

关于此用例，如果您有实时音频源（如麦克风或互联网广播流），则可以将此音频数据编码为更紧凑或标准化的格式，以实现高效传输或存储。

请使用以下语法，以便为不同的音频格式运行应用程序：

`gst-audio-encode-example -o <path-file>
                    --audio_format=<format>`

下表提供了命令行参数的说明：

| 命令行参数 | 说明 |
| --- | --- |
| `-o` | 指定输出音频文件的绝对路径。 |
| `-format` | 指定音频文件的格式：<ul class="ul" id="gst-audio-encode-example-without-flac__ul_vhx_vw5_4bc"><br>                                    <li class="li"><code class="ph codeph">1</code> = FLAC</li><br><br>                                    <li class="li"><code class="ph codeph">2</code> = WAV</li><br><br>                                </ul> |

运行 FLAC 和 WAV 音频格式的应用程序：

- 对 FLAC 音频进行编码：

        gst-audio-encode-example -o /opt/<filename>.flac --audio_format=1Copy to clipboard
- 编码 WAV 音频：

        gst-audio-encode-example -o /opt/<filename>.wav --audio_format=2Copy to clipboard

要显示可用的帮助选项，请在 SSH shell 中运行以下命令：

    gst-audio-encode-example --helpCopy to clipboard

如需停止用例，可按下 CTRL + C。

## 预期输出

采集的音频根据所选格式（FLAC 或 WAV）进行编码并写入文件。

从主机拉取文件：

    scp root@<IP address of target device>:/opt/<destination directory>Copy to clipboard

## Pipeline 流

在音频编码中，pipeline 根据编码格式略有不同。

该表列出了用于运行音频录制 pipeline 的插件：

| 插件 | FLAC | WAV |
| --- | --- | --- |
| pulsesrc | 从系统声音设备采集音频。 | 从系统声音设备采集音频。 |
| capsfilter | 确保音频采用适合 FLAC 编码器的格式。 | – |
| audioconvert | 将音频转换为所需的格式。 | 将音频转换为所需的格式。 |
| <ul class="ul" id="gst-audio-encode-example-without-flac__ul_n35_vy5_4bc"><br>                                    <li class="li">flacenc</li><br><br>                                    <li class="li">wavenc</li><br><br>                                </ul> | flacenc 将音频编码为 FLAC 格式。 | wavenc 将音频编码为 WAV 格式。 |
| filesink | 将编码的音频写入文件。 | 将编码的音频写入文件。 |

**上一级主题：** [视频和音频的示应用例程序](https://docs.qualcomm.com/doc/80-70017-50SC/topic/audio-sample-applications.html)

Last Published: Nov 11, 2025

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